MySQL error: unblock with mysqladmin flush hosts

Information troubleshooting :

#  Check the maximum number of wrong connections 
show global variables like 'max_connect_errors';

#  View connections IP
select * from performance_schema.host_cache

 #  Refresh database IP cache  
flush hosts


 #  View connections 
SELECT substring_index(host, ':',1) AS host_name, state, count(*) FROM information_schema.processlist GROUP BY state, host_name;

Fundamental way ：

 According to the findings IP The troubleshooting is deployed in this Ip Service database connection configuration on the server , The reason for this is the database connection configuration error 
ex: The database account password is incorrect ,ssl Not closed, etc ......）
 Correct modification can solve 

Shielding method :

solve : Access to database Use admin Permission account

1、 Put the variable max_connection_errors Set the value of to a larger value 

set global max_connect_errors=1500;


2、 Execute the command using flush hosts


3、 Changing the value of the system variable makes MySQL The server does not record host cache Information （ Don't suggest ） Such as ：set global host_cache_size=0;